我正在使用React和Redux。我希望Redux存储客户端信息（视口尺寸，浏览器名称和版本，操作系统等）。我已经设置了化简器和动作，并将所有状态映射到<App />组件的道具。在<App />组件内部有一个<Header />组件，可将道具传递到<NavigationBar />组件。 <NavigationBar />然后将道具映射到渲染<NavigationItems />，然后生成以下导航栏：
Home | About us | Apply | News | Login
但是，由于<App />组件内的props映射，每次用户调整视口大小时，Redux存储内的状态都会发生变化，<App />内的props也会发生变化，当然，React也要重新渲染整个导航栏会产生以下意外行为：
Home | Home | About us | Apply | News | Login
或
About us | Home | About us | Apply | News | Login
简而言之，<NavigationBar />返回的项目过多。
我已经包括了代码结构以便更好地说明：
Store (contains client info)
---> <App /> (map states, dispatchers from store to props)
---> <Header /> (functional component acts as container, pass navigation settings as props down to <NavigationBar />)
---> <NavigationBar /> (receives props from <Header /> and renders <NavigationItems /> component with props from <Header /> using map() function)
---> <NavigationItems /> (renders navigation items based on the props)
我还提供了代码，以防万一有人需要它：
rootTypes.js （定义操作类型）
export const tUpdateViewport = 'updateViewport'
rootActions.js （定义调度程序）
import { tUpdateViewport } from './rootTypes';
export const aUpdateViewport = () => ({type: tUpdateViewport })
rootReducer.js （定义应用程序简化程序并将其与其他程序组合）
import { tUpdateViewport } from './rootTypes';
import { combineReducers } from 'redux';
const appStates = {
viewportWidth: document.documentElement.clientWidth,
viewportHeight: document.documentElement.clientHeight,
};
const appReducer = (states = appStates, action) => {
switch(action.type) {
case tUpdateViewport:
return {
...states,
viewportWidth: document.documentElement.clientWidth,
viewportHeight: document.documentElement.clientHeight,
};
default:
return states;
}
};
export default combineReducers({
app: appReducer,
})
App.js （定义{{1}}组件并呈现<App />）
<Header /> Header.js （定义{{1}}组件并呈现import React from 'react';
import Header from './components/container/header/Header';
import * as actions from './rootActions';
import { connect } from 'react-redux';
const mapStatesToProps = states => ({
browserInfo: states.app
});
class App extends React.Component {
componentDidMount = () => {
window.addEventListener('resize', this.props.aUpdateViewport, false);
};
componentWillUnmount = () => {
window.removeEventListener('resize', this.props.aUpdateViewport, false);
};
render = () => {
return (
<Header />
);
};
}
export default connect(mapStatesToProps, actions)(App)
组件）
<Header /> NavigationBar.js （定义{{1}}组件并映射道具以渲染<NavigationBar />组件）
import React from 'react';
import NavigationBar from '../../presentational/header/NavigationBar';
import { Container, Grid, Row, Col } from '../../../css/Grid.css';
import { Header as Navigator } from '../../../css/Layout.css';
import logo from '../../../media/images/logo.png';
const Header = props => {
return (
<Navigator>
<Container>
<header>
<Grid>
<Row>
<Col>
<a href="#"><img src={logo} alt="CKY-UK Logo" /></a>
</Col>
<Col stretchWidth>
<Grid>
<Row stretchHeight alignEnd="md" alignMiddle="md">
<NavigationBar settings={{
items:
[
{
title: 'Home',
link: '/'
},
{
title: 'About us',
dropdownHierarchy: 'parents',
icons: [{
title: 'chevron-down',
iconPos: 'afterText'
}],
items: [{
title: 'Leadership Team',
link: '#leadership-team'
},
{
title: 'Star players',
link: '#star-players'
}]
},
{
title: 'Apply',
link: '#apply'
},
{
title: 'News',
link: '#news'
},
{
title: 'Login',
link: '#login',
icons: [{
title: 'sign-in-alt',
iconPos: 'beforeText'
}],
}
]
}} />
</Row>
</Grid>
</Col>
</Row>
</Grid>
</header>
</Container>
</Navigator>
);
};
export default Header
NavigationItems.js （定义{{1}}并呈现导航栏）
<NavigationBar />我该如何解决？用谷歌搜索地图问题，但没有找到想要的结果。任何帮助将不胜感激。